Try visualizing yourself getting faster and faster with each passing minute, and able to retain greater and greater amounts of information. Imagine what it is like to be able to go at twice the speed you're going now, but with the same comprehension. Try doing this as you're in a relaxed state in the Prepare step, and expect it to take place. Then, let go of worrying about the speed, and carrying on as you normally would.
It's okay to do several sessions until you've built up enough layers in knowledge, but as you move forward, attempt to keep shortening the time. As for the mind mapping, I recommend not doing the mind map until after the activation session. This allows for you to go at an easier, faster flow through the actual text. Then, all you've got to do is think for a few seconds, and write down what you remember onto the mind map. Later on, then try to go and fill in the gaps.
Reconsider your mind probing questions as well. Do you feel that these are getting you what you need, or want?
-youngprer
geocities.com/doc5587
pub117.ezboard.com/btheworldofyoungprer